MEASURING THE OPERATIONAL EFFICIENCY OF COMMERCIAL BANKS IN NAMIBIA

This paper examines the efficiency of commercial banks in Namibia using the standard econometric frontier approach. Although two aspects of efficiency (scale and scope) receive our attention, the emphasis is on the latter which pertains to whether a firm produces as efficiently as it possibly can, given its size. Our results indicate that substantial economies of scale exist in commercial banking in Namibia. This will tend to suggest that commercial banks in Namibia can increase their efficiency by increasing their current scale of operation. The results for scope economies show that the current level of input combination does not make for maximum efficiency as sufficient scope exists for a more efficient combination of inputs. We believe this will reduce operating costs in the industry and stimulate efficiency.     

基于成本调查的西安市中小物流企业运行效率分析与思考

通过对西安市中小物流企业实地调查,从成本的角度出发分析中小物流企业成本构成,通过探析导致各项成本发生的原因分析中小物流企业运行效率和引致成本升高的原因,并提出提高西安市中小物流企业运行效率、降低成本的具体实施措施。     

外包物流服务水平监督下的效率工资激励机制

针对如何提高第三方物流服务水平的问题,建立了物流服务水平监督下的效率工资激励机制,分析了监督程度与效率工资的关系,研究了外生变量对发包方最优监督程度和最优效率工资的影响,为促进第三方物流服务商提高服务水平提供了一种新思路.     

Testing equality of variances in the analysis of repeated measurements

The problem of comparing the precisions of two instruments using repeated measurements can be cast as an extension of the Pitman-Morgan problem of testing equality of variances of a bivariate normal distribution. Hawkins (1981) decomposes the hypothesis of equal variances in this model into two subhypotheses for which simple tests exist. For the overall hypothesis he proposes to combine the tests of the subhypotheses using Fisher's method and empirically compares the component tests and their combination with the likelihood ratio test. In this paper an attempt is made to resolve some discrepancies and puzzling conclusions in Hawkins's study and to propose simple modifications.
The new tests are compared to the tests discussed by Hawkins and to each other both in terms of the finite sample power (estimated by Monte Carlo simulation) and theoretically in terms of asymptotic relative efficiencies.     

同轴串接螺线管的自感及互感

本文对两个同轴螺线管串接后的自感、互感进行了定量计算,并对某些特殊情况也进行了推导,同时指出了某些论述之误。     

基于投资效能的分配决策模型在工程建设投资决策中的应用

在基于投资效能最大化的基础上,对工程建设投资分配模型的建立进行了初步的分析,为提高投资分配的决策提供了科学依据。     

Efficient local IV estimation of an empirical auction model

In this paper we examine semiparametric efficiency bounds and efficient estimators for the case of a linear local instrument variable (LIV) model under the assumptions studied in Abadie et al. (2002). We apply the semiparametrically efficient estimation method to analyze the relation between bid dispersion and early bidding in an online auction dataset, which is collected from a natural experiment conducted in Nekipelov (2007). The results confirm the theoretical findings developed in Nekipelov (2007). The semiparametric efficient estimation procedure substantially improves the statistical significance of the effect of jump bidding on bid dispersion.     

喷雾器喷头工艺优化模拟

本文利用moldflow软件优化喷雾器喷头,得到合理、可靠的注射工艺参素,优化模具结构。